content: /**
   * Copyright (c) 2016-present, RxJava Contributors.
   *
   * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in
   * compliance with the License. You may obtain a copy of the License at
   *
   * http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software distributed under the License is
   * distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See
   * the License for the specific language governing permissions and limitations under the License.
   */
  package io.reactivex.flowable.internal.operators;
  
  import org.reactivestreams.*;
  
  import hu.akarnokd.reactivestreams.extensions.RelaxedSubscriber;
  import io.reactivex.common.RxJavaCommonPlugins;
  import io.reactivex.flowable.Flowable;
  import io.reactivex.flowable.internal.subscriptions.SubscriptionArbiter;
  
  /**
   * Delays the subscription to the main source until the other
   * observable fires an event or completes.
   * @param <T> the main type
   * @param <U> the other value type, ignored
   */
  public final class FlowableDelaySubscriptionOther<T, U> extends Flowable<T> {
      final Publisher<? extends T> main;
      final Publisher<U> other;
  
      public FlowableDelaySubscriptionOther(Publisher<? extends T> main, Publisher<U> other) {
          this.main = main;
          this.other = other;
      }
  
      @Override
      public void subscribeActual(final Subscriber<? super T> child) {
          final SubscriptionArbiter serial = new SubscriptionArbiter();
          child.onSubscribe(serial);
  
          RelaxedSubscriber<U> otherSubscriber = new DelaySubscriber(serial, child);
  
          other.subscribe(otherSubscriber);
      }
  
      final class DelaySubscriber implements RelaxedSubscriber<U> {
          final SubscriptionArbiter serial;
          final Subscriber<? super T> child;
          boolean done;
  
          DelaySubscriber(SubscriptionArbiter serial, Subscriber<? super T> child) {
              this.serial = serial;
              this.child = child;
          }
  
          @Override
          public void onSubscribe(final Subscription s) {
              serial.setSubscription(new DelaySubscription(s));
              s.request(Long.MAX_VALUE);
          }
  
          @Override
          public void onNext(U t) {
              onComplete();
          }
  
          @Override
          public void onError(Throwable e) {
              if (done) {
                  RxJavaCommonPlugins.onError(e);
                  return;
              }
              done = true;
              child.onError(e);
          }
  
          @Override
          public void onComplete() {
              if (done) {
                  return;
              }
              done = true;
  
              main.subscribe(new OnCompleteSubscriber());
          }
  
          final class DelaySubscription implements Subscription {
              private final Subscription s;
  
              DelaySubscription(Subscription s) {
                  this.s = s;
              }
  
              @Override
              public void request(long n) {
                  // ignored
              }
  
              @Override
              public void cancel() {
                  s.cancel();
              }
          }
  
          final class OnCompleteSubscriber implements RelaxedSubscriber<T> {
              @Override
              public void onSubscribe(Subscription s) {
                  serial.setSubscription(s);
              }
  
              @Override
              public void onNext(T t) {
                  child.onNext(t);
              }
  
              @Override
              public void onError(Throwable t) {
                  child.onError(t);
              }
  
              @Override
              public void onComplete() {
                  child.onComplete();
              }
          }
      }
  }
  